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Q-SUN Solar Brand review

QN-555HT

555 Wp PERC
ComparePV verdict

Light for its output, short guarantee

Rank 7,504 of 14,005
Compare panels Datasheet PDF
Power (Wp)
555
Typical for its class
Efficiency (%)
21.50
Strong · top 18%
Density (Wp/m²)
214.8
Strong · top 20%
Temp (%/°C)
-0.340
Typical · median -0.350
Weight (kg)
26.0
Strong · 4.8 kg below median
Warranty (yrs)
25
Weak · bottom 24%

The Q-SUN Solar Qrystal P8 series is designed for high energy production in real-world operating conditions - where resistance to losses and stable performance over years are key. These modules utilize monocrystalline PERC technology and a half-cut design, which helps to minimize losses under partial shading and improve performance in variable sunlight conditions. In practice, this means more energy production throughout the day and more predictable output.

A key feature of the Qrystal P8 is its enhanced resistance to PID (Potential Induced Degradation), which is particularly important in installations exposed to moisture and prolonged voltage stress. The manufacturer also emphasizes the reduction of hot-spot risk and improved temperature stability, which helps the modules maintain their efficiency even during hot weather. For investors, the adaptability to harsh environmental conditions and the availability of full-size variants are also important, especially when aesthetics are a priority. This series is suitable for homes, businesses, and larger installations where reliability and long-term energy production are the primary concerns.

Ranking

589 panels in the segment PERC 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.50% 21.29% Strong · top 18% 7,958
Power density 214.8 212.9 Strong · top 20% 8,034
Temperature coefficient -0.340 -0.350 Typical 8,778
Weight per kWp 46.8 52.7 Strong · top 1% 1,375
Performance warranty 25 yrs 27 yrs Weak · bottom 24% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

8 positive · 5 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Owners who want a long output guarantee.

Strengths
46.8 kg per kWp

Top 1% of the PERC 550-600 W segment, against a median of 52.7. Ranked 1,375th in the whole database.

21.50% module efficiency

Top 18% of the PERC 550-600 W segment, against a median of 21.29%.

214.8 watts per square metre

Top 20% of the PERC 550-600 W segment, against a median of 212.9.

Watch-outs
25 year performance warranty

Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs.

What owners get
Up to 21.7% efficiency, top-tier segment

The upper efficiency bound of 21.7% matches Exiom's EX540-560M(B) and Fellow Energy's FE72-18X at the same 560 Wp max power, placing Qrystal P8 among the leading 144-cell PERC modules in its class.

Enhanced PID and hot-spot resistance

The manufacturer specifies improved resistance to potential-induced degradation (PID) and reduced hot-spot risk, which matters for installations exposed to humidity and prolonged voltage stress (e.g., industrial rooftops, ground-mount arrays).

Half-cut design limits shading losses

Half-cut mono-PERC construction (144 cells) reduces losses under partial shading and improves performance in variable irradiance compared to full-cell modules, resulting in more predictable daily yield.

25-year linear power warranty

The 25-year power degradation warranty is standard for the segment and offers a comparable level of investment protection to competing manufacturers in this class.

Full black variant available

Availability of full black variants addresses aesthetic requirements for residential installations, an increasingly common demand on pitched roofs.

Trade-offs
Manufacturer not on BNEF Tier-1 list

Q-SUN Solar (founded 2014, headquartered in China) does not appear on the current BloombergNEF Tier-1 list, which can complicate bank financing for larger installations, as lenders often require tier-1 module manufacturer status.

12-year product warranty below market trend

A 12-year product warranty is shorter than the 15-25 year standard now offered by many tier-1 manufacturers at comparable power and efficiency, reducing relative long-term investment security.

No bifacial variant at this power class

Unlike peer comparable Premier Energies (144 Half Cut PERC Bifacial Dual Glass, 560 Wp, 21.67%), the Qrystal P8 series is offered only in monofacial form, foregoing a potential 5-15% additional yield from albedo achievable on a comparable cell platform.

PERC technology instead of TOPCon/HJT

Q-SUN Solar's portfolio already includes newer N-type lines (Qrystal N8 TOPCon, HJT), while P8 relies on older PERC technology from 2021, which shows higher LID degradation and lower temperature performance than the N-type modules the same manufacturer now offers.

Notes from the database
  • Efficiency of 21.5% matches the PERC 550-600W median
  • At 214.8 W/m² power density, roof space requirements are typical for PERC 550-600W panels
  • At -0.34%/°C, hot weather performance is typical for PERC 550-600W panels
  • Weight of 26.0 kg (4.8 kg below PERC 550-600W median of 30.8 kg) allows easier transport and roof mounting
  • #7958 for efficiency, #8778 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 555 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.50 % Strong Segment median 21.29%
Vmpp · Impp 42.63 V · 13.02 A Operating point at max power
Voc · Isc 50.51 V · 13.74 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2278×1134×30 mm · 2.58 m² of roof
Weight 26.0 kg Strong Strong · 4.8 kg below median
Cells 144 · PERC Monocrystalline
Coefficient Pmax -0.340 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.250 · 0.040 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 24% · median 27 yrs
End-of-warranty output 84.8 % Equals 455 W guaranteed
Degradation 2.00 → 0.55 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.340 %/°C against a segment median of -0.350
-

Alternatives

All Q-SUN Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Q-SUN Solar QN-555HT 555 W 21.50% -0.340 26.0 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +3.5 pp, +5 yr warranty
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, +3.3 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg -50 W, cooler, +3.2 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, +3.1 pp, +5 yr warranty
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, lighter, +2.9 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg Cooler, +2.9 pp, +5 yr warranty
QNM182-HG530-72 530 W 20.50% -0.310 31.4 kg Heavier, -1.0 pp, +5 yr warranty
QNM182-HS535-72 535 W 20.70% -0.320 28.3 kg Cooler, heavier, -0.8 pp
QNM182-HS540-72 540 W 20.90% -0.320 28.3 kg Cooler, heavier, -0.6 pp
QN-540HT 540 W 20.80% -0.340 26.0 kg -15 W, -0.7 pp
QNM182-HS545-72 545 W 21.10% -0.320 28.3 kg Cooler, heavier, -0.4 pp
QN-545HT 545 W 21.10% -0.340 26.0 kg -10 W, -0.4 pp
QNM182-HS550-72 550 W 21.30% -0.320 28.3 kg Cooler, heavier
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +95 W, cooler, +3.7 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +90 W, cooler, +3.5 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +85 W, cooler, +3.3 pp

Found 2326 panels of the same or similar size to this one, within ±10 mm. See them here Found 2368 panels of the same or similar size to this one, within ±25 mm. See them here Found 2382 panels of the same or similar size to this one, within ±50 mm. See them here Found 2547 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty does the Q-SUN Solar Qrystal P8 come with?
The Qrystal P8 series comes with a 12-year product warranty and a 25-year linear power warranty. This means the manufacturer guarantees the modules will maintain a specified output level for a quarter of a century. It is a solid level of protection for long-term photovoltaic investments, providing confidence in predictable energy production throughout the system's operational lifetime.
What are the advantages of PERC half-cut cell technology in the Qrystal P8 series?
Monocrystalline PERC cells in a half-cut layout mean each cell is split in two, reducing internal resistance and heat losses. In practice, the panel performs better under partial shading — from an antenna, chimney, or dormer — because an issue in one half-row does not block the entire module. The result is higher daily energy yield under typical rooftop conditions.
Are the Q-SUN Solar Qrystal P8 panels suitable for a pitched roof with partial shading?
Yes, the Qrystal P8 series is a solid choice for roofs with shading obstacles. The half-cut construction makes the module less sensitive to partial shading than conventional full-cell panels. Enhanced PID resistance also protects against degradation in humid environments, which is common on older rooftops or buildings located near bodies of water.
What is the maximum power output of the Qrystal P8 and how many panels does a typical home need?
The top variant of the Qrystal P8 series reaches 560 Wp peak power. For a typical residential system sized between 6 and 10 kWp, only 11 to 18 modules are needed. This high per-panel wattage reduces the number of modules required for a given system capacity, simplifying the design and potentially lowering costs for racking hardware and DC wiring.
Is the Qrystal P8 available in an all-black version, and does it affect performance?
Yes, Q-SUN Solar offers all-black variants of the Qrystal P8 series for installations where aesthetics matter. The black frame and backsheet allow the panels to blend seamlessly into the roofing material. Worth noting: a black frame can slightly raise the module's operating temperature, but the improved temperature stability highlighted for the Qrystal P8 series effectively minimizes this effect.
How do Qrystal P8 panels handle high summer temperatures and do they lose significant power in the heat?
Q-SUN Solar highlights improved temperature stability for the Qrystal P8 series compared to standard monocrystalline modules. In practice, this means a smaller power drop on hot days when panels reach operating temperatures of 60–70°C. For system owners, this translates to higher energy yield during peak summer months and more predictable annual production, which is especially relevant for net metering calculations.
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